A New Geometric Knee for Total Knee Arthroplasty

Arthroplasty of the knee in osteoarthritis and rheumatoid arthritis

“…The St. Georg prosthesis was used only in cases of OA in which the medial, and occasionally the lateral, part of the joint was involved (Figures 1 a and b). When the OA had affected the lateral as well as the medial part, and in cases of RA, the Geomedic prosthesis was preferred (Figures 2 a and standard surgical techniques were used (Engelbrecht 1971, Coventry et al 1972, Alnot et al 1971. The operation was performed with a tourniquet above the knee.…”

The Evolution of Modern Total Knee Prostheses

“…Geomedic knee arthroplasty was introduced by Coventry et al at the Mayo Clinic in 1972 [6], and consisted of a polyethylene tibial instrument which was of one structure and was in joint with the femoral condyles. This design was initially devised to sustain the cruciate ligament, but joint mobility was limited because of pathologic posterior cruciate ligament in some cases.…”

“…First, in 1976, Ranawart et al [8] at the Hospital for Special Surgery, developed the duocondylar prosthesis; second, Coventry et al [6] developed the geometric prosthesis; and third, Townley [9] developed the anatomic prosthesis. The condylar prosthesis developed by Ranawart et al preserved the anterior and posterior cruciate ligaments, provided stability of the knee joint, and used bone cement for fixation to bone.…”

History of Total Knee Replacement

“…In most cases however, single components were designed to be applied to cover medial and lateral condyles of both femur and tibia. The Geometric prosthesis (Coventry et al 1972;Skolnick et al 1976a) (Fig. 1.5) emerged as one of the most popular and was basically a modification of the modular types with a con- necting strut between the two metal femoral runners and a polyethylene bridge between the tibial sockets.…”